Multiple-spindle metal-turning machine



May lo 1927' c. M. PETERsEN MULTIPLE SPINDLE METAL TURNING MACHINE Filed July 31. 1924 9 Sheets-Sheet 1 Hll 9 sheets-sheet 2 C. M. PETERSEN MULTPLE SPINDLE METAL TURNING MACHINE Filed July .'51, 1924 May 1o, 1927.

May 1o, 1927.

C. M. PETERSEN MULTIPLE SPINDLE METAL TURNING MACHINE Filed July 3l. 1924 9 Sheets-Sheet 3 May 10,1927.

C. M. PETERSEN MULTIPLE SPINDLE METAL TURNING MACHINE Filed July 31. 1924 9 Sheets-Sheet 4 l 19 May 0 27 c. M. PETERSEN MULTIPLE SPINDLE METAL TURNING MACHINE Filed July 31. 1924 9 Sheets-SheetA 5 EAT gmvcubsz @Harnais mK L 1,628,061 May 10 1927 c. M. PETERSEN MULTIPLE SPINDLE METAL TURNING MACHINE Filed July 31. 1924 9 Sheets-Sheet 5 y c. M. PETERSEN MULTIPLE SPINDLE METAL TURNING MACHINE Filed July 3l. 1924 9 Sheets-SheetA j n vente@ May l0, 1927.

c. M. PETERsr-:N

MULTIPLE SPINDLE METAL TURNING MACHINE FiledvJuly 31. 1924 9 Sheets-Sheet 8 1,628,061 May 10 l927 c. M. PETERSEN MULTIPLE SPINDLE METAL TURNING MACHINE Filed July 31. 1924 9 Sheets-Sheet 9 Patented May 10, 1927.

UNITED STATES PATENT OFFICE.

MACHINE TOOL COMPANY, OF BRIDGEPORT,

CNNECTICUT.

CONNECTICUT, A CORPORATION OF MULTIPLE-SPINDLE METAL-TURNING MACHINE.

Application filed July 31,

This invention relates to metal turning machines, and particularly `to multiple spindle machines in which a` plurality of'ditfer ent operations may be performed on a number of similar pieces at the same time. It isan object. of the invention to produce a machine of this Character having a great production capacity and still will be very simple in construction.

It is also an object of the invention to provide a separate feed for the tools of each working station and which may be varied both as to extent and the rate of feed.

It is a still further object ofthe invention to provide a device of this character in `vhichV the various operations are performed substantially automatically, but in which the machine is at all` times under manual` control.

iVith the foregoing and other objects in view, I have devised the construction illustrated in the accompanying drawings forming a part of this specification, similar reference characters being employed throughout the various figures to indicate correspinding elements. In these drawings,

Fig. 1 is a front elevation of the work spindle end of the machine.

Fig. 2 is a front elevation of the other or tool drive end of the machine.

Fig. 3 is a longitudinal section substantially on line 3-3 of Fig. 1.

Fig. 4 is a detail sectionalvvicw of one of the locking means for the rotatable spindle carrier, the section being substantially on line 4-4 of Fig. 3.

Fig. 5 is a longitudinal sectionsubstantially on line 5 5 of Fig. 2.

Fig. is a detail view of the tool carrier.

Fig. 7 is a transverse section through a, llcxible drive connection for the tool carrier, taken substantially on line 7-7 of Fig. 5.

. Fig. is an end elevation looking from the left of Fig. 1, a portion of the frame being roken away to more clearly show a portion of the drive -and control mechanisms.

i Fig. 9 is atrausverse section substantially on line 9-9 of Fig. 1 and showing a portion of the indexing mechanism.

Fig. 1() is a detail elevation of a portion of the-tripping mechanism for the indexing device shown m tripping position:

Fig l1 `is a detail section through the in- 1924. Serial No. 729,202.

flexing tripping mechanism and mainl clutch drive, the section being taken substantially on line 11-11 of Fig. 8.

Fig. 12 is a detail section through the indexing mechanism taken substantially on line 12-12 of Fig. 9.

Fig. 13 is a transverse section substantially on line 13-13 of Fig. 5.

Fig. 14- is a transverse section substantially-on line 141-14 of Fig. 5.

Fig. 15 is a transverse section substantially on line 15-15 of Fig. 5.

Fig. 1G is an end elevation looking from the right of Fig. 5, portions of the frame being broken away to show a portion of the safety device.

Fig. 17 is a perspective view of the manual control mechanism, and

Fig. 18 is a development of the cam used in the manual control mechanism.A

The machine includes a base or frame 2() comprising a main casting 'machined to carry the main slide, shafts and other units, and space is provided in the lower part thereof for the electric motor 2l for driving the machine.

War/c carry/ng spindles and spindle' carm'e/zMounted on the base is a bracket 22 in which the turret or spindle carrier 23 is mounted to rotate. This carrier has a plurality of bearings 24 secured thereto by any suitable means, such as screws 25, and other bearings 26 at the other end secured by screws 27, in which the work carrying spindles 28 are mounted to r0tate.` These spindles carry at their forward endschucks 2t) for carrying the. work, and keyed to the other end of each spindle is the member 30 of a driving clutch provided with suitable teeth to mesh with the corresponding teeth of a sliding clutch member 31 keyed to driving spindles 232 in alignment with the work carrying spindles, there being a driving spindle for each of the work carrying spin-` dles except at.one station, which is the loading and unloading station, indicated at the bottom of Fig. 3. A spring 33 tends to move the clutch member 31 toward the other clutch member 30 and keep it in mesh therewith, this movement of the member 31 being limited, however, by a stop plate 34 secured to the end of the spindles 32 which maintains this clutch out of mesh with the member 230 when the spindle carrier is indexing as will later be described. fl`he driving spindles 32 are mounted in :suitable bearings in the brackets IE5 mounted on the frame, and the)v are all driven from a central drive shaft 3G by an individual gear drive for each spindle, that shown in Fig. 3 being a pinion 53T keyed to the central shaft meshing with a gear 3h on a driving spindle 32. The ratios of these gears may be varied for each spindle so as to give different rates of rotation for the ditl'erent spindles, as desired. Thus the various spindles may be driven at different speeds, but they are all driven from al central shaft. The central shaft 36 is driven through the gear train 39, 40, 41, 42 and .423, the gear 43 being keyed to the tubular shaft. 44 driven through the disc clutch which is in turn driven from the main drive shaft ftt' through the gears 47 and 48. the shaft 4G beingvconnected to the motor 2l through a suitable coupling 49.

The turret or spindle carrier is locked to the bracket QZ to prevent rotation thereof during the working operation by suitable lock pins 50 and 5l shown in Figs. 3 and 4, these pins being secured to the bracket. and the flange 52 on the spindle carrier respectively. Any desired number of these pins may be provided but I lhave shownl six. The inner end of pin 5l is provided with a transverse tongue 53 seating in a groove in the opposed end of pin 5() and these tongues and grooves are preferably tapered to facilitate the locking movement. The. pins are unlocked by a longitudinal movement of the spindle carrier toward the tool heads or to the right, as viewed in vFig.A 3, which movement not only unlocks the pins but also disconnects the clutches 3t-3l and ,n'epares the carrier for the indexing movement. This longitudinal movement is imparted to the, carrier through a lever 5t pivoted in the frame. at having a fork 5G at its upper end operating in a groove in the hub :3T of the carrier, ard carrying a roller at its lower end running in a cam groove in a cam .327 carried by the shaft. Gt). This shaft also drivesl the indexing mechanism which operatesl to index the spindle carrier to advance the. work to the next station after this carrier has been unlocked and the clutch connection to the driving spindles released.

ndf'.1ez`ng.-1 `or indexing the spindle carrier, or advancing the work from one working station t'o another, vthis earriersis given a step by step or intermittent movement through a suitable Geneva movement. This mechanism is shown more clearly in Figs. 9 and 12. Keyed to the shaft G0 is a gear 6i meshing with an idler 62 which in turn meshes with a ear 63 keyed to a shaft 64. Also keyed to t is shaft is ay crank arm 65 carrying a. roller (S6 adapted to pass into slots 67 in the end of the spindle carrier to impart. the indexingr or step by step movement to this'carrier. This index arm (37: makes one complete revolution at. each indexing operation, and is timed with the lock cam 59 and shaft 60 to suit, the gear ratio between this shaftand the shaft carrying the crank arm being one to one. After the indexing operation, or the carrier is given one movement, it is moved longitudinally to the left, as viewed in Fig. 3, by means of` cam 59 and lever 5t and locked in this position by the pins 50 and 5l. This movement also places the clutches 30 and 31 in mesh or at least places them in position so that they may mesh as soon as the-driving shafts begin to rotate, should the teeth on the clutch member not be in proper alignment. If they are not in proper alignment the springs 33 allow the.' members 31 to yield and then force the clutch members into engagement as soon as the spindles commence to rotate.

T 00X carriers and feeding fnzecham'sm.a The tools indicated diagrammatically at 68 in Figs. l, 2, and 5 are mounted in suitable holders 69 carried by suitable carriers 70. and these carriers are mounted on round feeding bars 7l, (Fig. 5), there beingr one of these feeding bars for each chuck except the chuck left idle for loading and unloading which in the present case is the chuck at the left of Fig. 13.01' the bottom of Fig. 3. Any desired number of cutting tools may be carried by each bar, there being one only shown in the drawings to simplify the illustration. These bars are each provided with an individual feeding mechanism so that they may each be given a separate feed and stroke for each operation as the ma' chine indexes if desired. Each bar is provided with a guide block 72 secured thereto, as by clamping screws 73, and thei-e blocks extend into guide slots 74 in the bracket. 75. 'lhc bars 7l are mounted in this bracket for both longitudinal and rotary movements. which movements may, however, be limited by these blocks. Suitable eoaeting stops 7G and 77 may be provided on the bracket 7 5 and guide blocks 72 respectively to limit this longitudinal movement, and during this movement, rotative movement is prevented by the tapered blocks 78, (Fig. 13), adjustably secured to the block T2 h v thev strap 7S) andthe adjusting screws Htl. It the rotative movement. is desired the block 78 is removed as shown for the upper right hand bar in Fig. 1? and the 'side ot the slot 6T forms a stop to limit the rotative movement. In this case as the bar 71 rotates the cutting tools move in an are which gives them' their transverse feed.

Each tool carrier and feed bar has an individual feed and driving means therefor, which are all operated from a single shaft 81 keyed to the central drive shaft 36 (Fig. 3). A pinion sleeve 82 is provided running in suitable bearings in the brackets and 83, which sleeve is provided with a long keyway 84 in which a key 85 on shaft 81 is adapted to slide to take care of the movements of the main slide 86 on which the tool carrier and feed mechanism are mounted, and which slide is moved away from the work just before the indexing operation, and returns to its working position after the indexing operation through mechanism which will pre;- ently be described.

The feeding mechanism for the tool tarriers is driven from the shaft 81 through the gear train 87. 8S, shaft 89, gears 90 and 91, the latter being keyed to sleeve 92, (Fig. 5), which gear train reduces the speed from the shaft 81. The sleeve 92 is provided with clutch teeth adapted to mesh with similar teeth on a sliding clutch member 93 keyed to. shaft 94. This shaft 94 may also be driven direct and at a higher speed to give a quick return to the feeding mechanism, through a sliding clutch member 95 also keyed to this shaft having teeth to engage suitable teeth on the end of the pinion sleeve 82. Keyed to the shaft 94 is a pinion 96 which meshes with a gear 97 keyed to a shaft 98. This latter shaft drives a separate gear train for each feeding bar, one train only being shown in Fig. 5 and comprising the gears 99, 100, 101, and gear 102 keyed to shaft 103. This shaft drives a long pinion 104 meshing with gear 105. As stated above there is one of these gear trains from shaft 98 for each tool caiirier and feeding bar but gear train 99, 100, 101 and 102 for each carrier may be varied in ratio to suit the feed required for each individual carrier.

The gear 105 has a threaded opening therethrough having threaded engagement with screw 100, and this screw is keyed to a mutilated gear 107, which gear, as shown in Fig. 14, has one tooth removed to prevent its meshing with pinion 104 except under certain conditions. Screw also has a sliding connection with gear 107 so that it may be moved with respect thereto to prevent driving of the gear 107. if desired. 'hen the screw is shifted to thel right as viewed'in Fig. 5 it will shift gear away from gear 107 and prevent eugagement ot' the clutch teeth on gear 105 with those on gear 107. The screw may be held in either of the two positions by a spring pressed ball 109 adapted to seat. in either cf two reees,es in the ke v carried b the screw. The screw may be shifted by means of a hand knob 109. Gear 107 has a bearing in bracket H3 and a screw 110,is keyed and )inned to this gear, and this` screw has tlhreaded engagement with the feed bar T1. A sleeve 111 is keyed to gear 107 and may be clamped about the bar 71 by a clampingscrew 112. This sleeve ordinarily rotates freely on the bar 71 but may be clamped thereto by screw 112 to give the cros feed to the tool carrier. The shat't 103 is connected ,to pinion 104 through a .vieldable connection indicated in Figs. 5 and 7. This connection comprises a pair of collars 113 and 114 clamped to thel shaft 103, and pinion 104 respectively by means of clamping screws 115. They are provided with laterally projecting lugs 11G between which are coil springs 117. lVhen the stop block 72 reaches the limit of its movement the springs will yield and give the tool.; a dwell long enough to complete the last turn of the chucks at the end of the operation.

(ears 105 and 107 have clutch teeth 118 and 119 respectively on their opposed faces and gear 105 is at all times in mesh with the pinion 104. Mutilatcd gear 107, however, is in mesh with the pinion 104 only during the feeding operation and a portion of the reverse and is brought into mesh with the pinion through the action of gear 105 as its clutch teeth engage those of the pinion 107. Gear 105, however, provides a lost motion connection between the pinion 104 vand the feed, the amount of which lost motion may be adjusted by loosening the clamping screws 115, rotating the elements 104 and 105 and reclamping the screws 115. As pinion 104 is rotated gear 105 moves along the screw 10G till its clutch teeth engage those on the gear 107 and starts to rotate this gear which will force the teeth on this gear 107 into mesh with pinion 104. This is done so that the pinion 104 will return the feeding bar to its retracted position, when the main feed mechanism is reversed. The return movement of gear 107 is limited by suitable stops 107 and 88 carried by the gear and bracket 83.

Means is provided for changing the clutches 93 and 95 from feed to reverse and from reverse to feed, as the case ma f be, in the operationof the machine. For t iis purpose a shaft 120 is provided -and mounted for rotative and longitudinal movement. A cam 121 is keyed to this shaft and has a groove in which a stationary pin 122 projects, and the cam groovel is so cut that one revolution ot' the shafty causes the shaft to make one complete longitudinal reciprocatiou forward and back. A collal' 123B is secured to thisshaft and provides a limit stop for a collar 124 slidable on the shaft and also forms an abutment for one end of a spring 125. A collar 126 similar to 124 is also slidable on the shaft, and collars 124 andl 126 are provided with forks projecting into grooves in the slidable clutch members 95 and 93 respectively to operate them. A spring 127 is located between these collars l et) ltlf) llt) tending to move them in opposite directions and place the clutches in driving engagement. The other end of spring 125 presses against a clutch sleeve 128 slidable on the fhaft 120 but keyed thereto, and is provided with clutch teeth at .its opposite end adapted to mesh with teeth on the shaft carrying gear S7` so that under certain conditions this shaft may be driven from this gear through sleeve 128. This sleeve carries an inclined cam surface 129 located on one side thereof which is adapted to engage pins 130, (Figs. 5 and 14). carried by a hand lever 131 on opposite sides of this sleeve, and which lcver is mounted on a threaded' sleeve or screw 132. The shaft 12() is designed to make onehalf a revolution at a time, which actuates the collars 124 and 126 and shifts the clutch elements 93 and 95 to cause one change in the clutches. This half turn is caused by the clutch teeth on the end of the shaft carrying gear 87 meshing with the sliding sleeve 128, the spring 125 tending to engage these clutch members but `is prevented by one of the pins 130 engaging the cam 129. When a change is required movement of lever 1,31 must take place and disengage one of the pins 130 from cam 129. This allows the sleeve 128 to slide under the action of spring 125 and engage the end of the shaft carrying the gear 87. This movement of the lever, however, brings the other pin 130 into the path of movement of the cam 129 and thus the half revolution of the shaft will disengage this clutch at the end thereof by action of cam 129 on this pin. This action repeats itself when either an up or down movement of the lever 131 takes place.

)Vhen the machine is in operation this action should be performed automatically to throw the machine into reverse or Vreturn when the several operations on the work is completed, and it also moves itself back into position to be thrown into feed when the.

return is completed. It is prevented, however, from going into feed by a` lever 133 (Figs. 5 and 15) pivoted to the bracket 134 at 135. This lever' has a pin and slot connection 13G with a hand lever 137 pivoted to the bracket at 138. and these levers are so arranged that the free end of lever 133 is in alignment with collar 126 when the reverse clutch 95 is thrown out by shaft 120 being shifted to the right, as viewed in Fig. 5, and will hold the feed clutch 93 out of mesh until thisl lever has been tripped to allow spring 127 to move the feed clutch into mesh. 1n other words as the shaft 120 is shifted to the right, as viewed in Fig. 5, under the action of cam 129 and pin 130 to throw out the reverse clutch 95 and clutch 128, the lever 133 prevents the feed clutch from going to driving position, but the shaft 120 completes its half turn and compresses spring 127 and leaves the clutch 93 ready to snap into feed as soon as it is released by the tripping of lever 133. This delayed action is necessary because the feed must not start again until the machine has indexed and is ready for the next operation.

Automatic tripping mechanism.-These operations are caused to take place automatically by suitable tripping mechanism. The-screw 132 is hollow for passage of the shaft 89 but has, however, no driving connection therewith and a lever 139 is keyed to this screw. This lever is provided with a clutch tooth 140 on one side thereof and a dog or stud 141 on the other side which projects into an elongated slot or recess 142 in the lever 131. It is thus possible to operate the lever 131 by hand without operating the lever 139. Agear 143 has threaded engagement with a threaded sleeve or screw 132, and has a clutch tooth 144 adapted to engage a tooth 140 on lever 139 and trip clutch 95 into reverse through the lever 131. The gear 143 is so timed that it will perform this action just as all the several operations on the work are completed. This gear is driven by gear 97, (Figs. 2, 5, 14 and 15), through gear train 145, 146, 147, 148, and a long pinion 149 which meshes with this gear, and it slides along this pinion under the action of the screw thread on sleeve 132 as it is revolved by the pinion, and it works back and forth on this screw to and from engagement with the clutch tooth on the lever 139. )Vhen these clutch teeth engage, the feed is tripped into reverse as above indicated and the gear 139 is then rotated in the opposite direction and at a much higher speed. The gear is also provided on its other side with a clutch tooth 150 which is adapted to engage with a clutch tooth 151 on a nut 152 rigidly secured on the screw 132. This action throws the levers 139 and 131 in the opposite direction which again reverses the clutches 93 and 95 from quick return into a position to snap into feed when the feed clutch 93 is released by the lever 133. This is the position of the elements shown in Fig. The nut 152 is provided with clutch teeth engaging corresponding teeth on a washer 153, which washer is keyed to the screw 132, and a lock nut 154 is provided to lock the washer and the nut 152 to the screw after they have been adjusted to the desired position. Means is provided to automatically trip the lever 133 and allow the feed clutch 93 to engage, and this tripping device is arranged to be operated hv movement ol' the main slide 86 away rom the work. For this purpose a cam plate 155 is adjustably mounted on the side of the frame by means of clamp screws 156 extending through elongated slots 157 in this plate,

and it is provided with an upwardl)v pro jeeting cam 158 adapted to engage a slidahle.

pin 159 carried by the slide. The upper end of this pin lies under the lever 137 so that as the pin passes over the cam 158 the lever 133 is tripped to release the feed clutch and allow it to snap into feed position. As will later appear this operation takes place after the main clutch has been released so that the feed ofthe tools does not start until the main clutch is thrown in again.

The mainl drive and tripping of mleacing neerlandesa-As described above the motor 21 drives the shaft 46, and through the pinion 48 meshing with gear 47 which is secured to the casing 16() of the disc clutch 45 drives the tubular shaft 44 and the central drive sha ft 36 through the gear train 43. 42, 41, 4t) and 39. The gear 47 is also keyed to a shaft 161 extending through the tubular shaft 44 so that this shaft 161 rotates at all times with the gear 47, and is always rotating 'when the motor is ruiming. A pinion 162 is keyed to this shaft 161 and meshes with a gear 163 keyed to a clutch member 164 mounted to rotate in a suitable bearing 165 in the frame. A shaft 166 is slidable longitudinallyv in the frame and the clutch member 164, but it does not rotate as it is keyed to the frame through a slidingr key 167. Itv carries a clutch pinion 168 which is rotatable thereon and is provided with clutch teeth to engage the clutch teeth on the member 164. This clutch pinion meshes with a gear 169 keyed to the shaft which drives the indexing arm 65 and the lock cam 59 which locks and unlocks the spindle carrier 23. A clutch housing 176 is secured to the frame of the machine, (Fig. 11), and carries a multiple disc clutch 171 which is thrown in when the main drive clutch 45 is thrown out, and acts as a brake to quickly stop the work carrying spindles. lt is released when the main clutch 45 is thrown into driving position.

A cam sleeve 172 is pinned and keyed to the shaft 166 and is engaged by a spring 171i which tends to engage the clutch members 168 and 164` but which is normally prevented from doing so by a cam 174 mounted on a disc 175 (Figs. 8 and 11). This dise is free to move on the shaft 66 but its movement is limited by a pin 176 projecting into a slot 177 in the disc, the pin 176 being carried by the gear 169. This disc may be manually shifted to cause indexing of the spindle carrier. For this purpose a shaft 178 is mounted in the frame and carries a hand lever 179 in a position easily accessible to the operator, and if desired this lever anay carry a chuck wrench 180 for use at the loa( ing station. An arm 181 is secured to the shaft and is connected by a link or bar 182 to an arm 183 carrying a pawl 184 resting on the periphery of the disc 175. The periphery of this disc is provided with a notch forming a shoulder 185 and when the hand lever 179 is pulled forwardly the pawl 184 engages shoulder 185 and swings the dise 175 sufficiently to move cam 174 out of engagement with the cam on the sleeve 172. T is allows the spring 173 to engage clutch members 168 and 164 which then rotate the gear 169 and the shaft 60 one revolution. This rotation of the shaft through the cam 59 and lever 54 shifts the spindle carrier 23 to ward the tool heads, and unlocks it and through the gears 61, 62, and 63 rotates the crank arm to index the carrier. Rotation of shaft 60 also carries the disc 175 with it, and at the completion of one revolution the cam 174 engages the sleeve 172 and throws out the clutch 168-164.

Safefj/ contrai of indewng-lllcaiis is provided, however, to prevent operation of the hand lever 179 to cause this indexing operation until all the tools have been moved away from the work. Mounted on the shaft 178 is a cam 186, (Fig. 17), having a cam groove 187 to receive the end of a lever 188 which is pivoted to the frame at 189 and has a fork 19t) for operating the main drive cluth 45 and the brake 171. Also secured to the shaft 178 is an arm 191, and mounted on a parallel .shaft 192 is a safety catch 193 adapted to move to and from the path of movement of the arm 191. Keyed to the shaft 192 are a pair of arms 194 spaced from each other a suitable distance and they carry a rod 195 at their free ends, which rod passes through a slot 196 in a connecting bar 197 which is pivoted to the lever 139, (Fig. As this connecting bar reciprocated with the main slide, the connection 195-196 with the shaft 192 allows for this longitudinal movement. The shaft 192 is normally held with the catch 193 raised or in a safety position to stop movement of the arm 191 by a spring 198 engaging a lug 199 keyed to the shaft. A similar lug 266 is adapted toy engage an adjustable stop screw 20] to limit the movement of this shaft. lty will thus be apparent that the shaft 178 cannot be shifted under the action of hand lever 179 to trip the indexing mechanism until the bar 197 has been deprersed by gear 143 engaging the nut 152 or at the end of the reverse move-` ment of the tools and they are, therefore, out of the way. The operations caused by the hand lever 179 when pulled away from the chuck is as follows: the chuck wrench 18() is disconnected from the clmek, and the main clutch 45 is disconnected through the cam 186 and lever 188. As soon as this clutch is disconnected the brake clutch 171 is applied to stop the machine quickly. During these operations the pawl 184, (Figs. 8 and 10). has been moving toward the shoulder 185 in the edge of the dise 175. Further movement of the lever then causes this pawl to shifty the discs 175 and move the cam 174 away from the cam sleeve 172 and the indexing then takes place as above described.

This action, of course, can take place only after all the tools have been moved away from the work as otherwise the safety catch 193 will prevent operation of the lever 179.

safety device is also provided to prevent movement of the hand lever 179 back to a position to throw in the main clutch 45 while the machine is indexing. Referring to Figs. 8 and 10, a lever 217 is pivoted in the frame at 218 and is provided with a projection 219 resting on the pe ripliery of the disc 175 but out of alignment. with the portion o11 the disc on which pawl 181 rests. This portion of the periphery is also provided with a notch 220. l)uring the indexing operation the level' 127 is lifted by the. end of' the projection 219 resting on the periphery of the disc so that the end 221 of the lever is in alignment with thc end of the connecting bar 152. It will thus prevent the movement o1I this bar and the lever 179 backwardly to throw in the main clutch. After the indexing operation has been completed, as shown in Fig. 8 the projection 219 drops into the notch 220 and moves the end 221 away from the end of the bar 182. The lever 179 may now` be manipulated to throw in the main clutch and start the machine operating.

The main slide 8G is reciprocated from the shaft 00 in certain timing relation with the indexing operation. Mounted on the shaft is a spiral gear 202, (Figs. 2 and 15), meshing with a similar gear 2015 on a vertical shaft 204 carrying a crank 205. This crank is provided with a transverse T-slot 200 to receive the head of a crank pin 207 carrying a block 208 which has teeth engaging similar teeth 209 on the crank pin 205. A connecting rod 210 embraces this pin and at its other end embraces a similar pin 211 in a T-slot 212 in a block 213 connected to the under side of the slide. These pins are provided with nuts 214 and 215 respectively, and the pin 211 also carries a block 216 having teeth to engage similar teeth on the block 213. By loosening the nut 21-1 the distance of the crank pin 207 from its axis of rotation may be varied by sliding it in the crank 205 and then mav be secured in adjusted position. Thus the amount of movement of the main slide may be adjusted as desired. The position of the slide may be adjusted by loosening the nut 215 and sliding the pin 211 and its block 216 on the block 213.

'hen the main slide 86 moves away from the work so that the indexing of the carrier can take place, pin 159, (Fig. 2), slides over the cani 158 and causes an upward motion to the lever 137. This motion is transferred to the stop lever 133 and allows the clutch 93 to sna into feed, but the feed does not start until the main disc clutch 45 is engaged through the lever 179.

I n operation-The rotation of the shaft 60 causes the following operations in substantially the order given, although some of these operations may overlap. First, the main slide 86 is moved to the right, as viewed in Fig. 2, or away from the working position. The spindle carrier 23 is then shifted to the right, as viewed in Figs, 1 and 3, by means of cam 59 to unlock it. This carrier is then indexed to move all the chucks to the next working station by means of the indexing arm 65. The work carrier is then shifted back by the cam 59 and locked and then the main slide. S0 carrying the tools is .shifted back to thev working position. There is then a final locking of the spindle carrier by the cani' 59. During the unlocking of the spindle carrier, the indexing of this carrier and its locking there is a slight movement of the main slide, but this movenient is away from the work in the chucks. lt. therefore, docs not interfere with it.

From the foregoing description it will be clear that by adjusting the gears (Fig. 5), for each particular working station that the operations at the respective station will be timed to start at different times according to the length of time required for its particular operation, but all the operations will be completed at the same time. Thus if the longest operation requires tive minutes`the gear 105 for this operation will always be in driving en agement with its gear 107, and feeding o the tool or tools connected therewith will start as soon as the machine is started. The drive for this station is the lowest one shown in Fig. 2. If the next station requires only four minutes for its operation its gear 105 will be adjusted on screw 106 so that it will not engage its gear 107 until a minute later and so on for all the respective stations.

It will also be clear from the above description that the machine is partly automatic in that it is automatically tripped at the end of the working operation to throw the tool feeds into reverse, but the machine is under manual control at all times through the hand levers 131, 137 and 179. Safety devices are, however, provided so that these levers cannot be operated when the elements ot' the machine are in positons when such operation will cause injury to the mechanism.

Having thus set forth the nature of my invention, what I claim is:

1. ln a machine of the class described, a plurality of working stations, a,tool for each station, a feeding means for each tool including a revolving feed member, and means for controlling said feeding means comprising a rotatable and longitudinallv movable driving-member for each feed meniber adapted for individual adjustment so that they may be arranged so the individual llo feed members will start to revolve at different times and will cease to revolve at the same time.

2. In a multiple spindle machine the cornbination with a rotatable carrier, a plurality of rotatable work carriers mounted therein, a plurality of non-rotatable tool carriers, a rotatable feeding means for each carrier movable longitudinally of its axis, means to cooperate with said feeding means arranged to become effective after a given longitudinal movement of said means, and an individual rotatable driving member for operating each of the individual feeding means.

il. In a machine of the class described, a plurality of tool carriers, a rotatable feeding means for each carrier, an individual rotatable and longitudinally moving driving means for controlling said feeding means arranged to engage and operate the individual feeding means after a 'given movement so that the individual feeding means may begin to function at different times, and means for varying the timing of said feeding means.

4. In a machine of the class described, a tool carrier, means for imparting a feeding movement to said carrier, a driving means for said feeding means having a lost motion connection therewith comprising a rotatable and longitudinally movable driving member arranged to engage and drive said feeding means after a given longitudinal movement, and means for rotating said member.

5. In a machine of the class described, a plurality of tool carriers, a feeding means for each carrier including a revolving member, and an independent rotatable and longitudinally movable driving means for each feeding means having a lost motion connection therewith and adapted to engage and operate said feeding means.

6. ln a machine of the class described, a plurality of working stations, a tool for each station, a feeding means for each tool, and an independent rotatable and longitudinally movable driving means for each feeding means having a lost motion connection therewith and adapted to engage and operate said feeding means at predetermined times.

7. In a machine of the class described, a rotatable spindle support, a plurality of work carrying spindles carried by said support` a plurality of tool carriers, a rotatable feeding means for each carrier, and an independent rotatable and longitudinally movable driving means for each feeding means having a lost motion connection therewith and adapted to engage and operate said feeding means.

tv'. In a machine of the class described, a rotatable spindle support, a plurality of work carrying spindles carried by said support, a slide movable toward and from said support, a plurality of tool carriers mounted on said slide, a feeding means for each carrier and an independent driving means for each feeding means having a lost motion connection therewith.

t). In a machine of the class described, a plurality of work carrying spindles, a slide movable toward and from said spindles, a plurality of tool carriers mounted on said slide, a feeding means for each carrier, and an independent driving means for each feedmg means.

l0. In a machine of the class described, a tool carrier, feeding means for said carrier, a driving means for said feeding means comprising a mutilated gear connected with said feeding means, a second gear, a driving connection between said gears arranged to be engaged and disengaged by relative movement between said gears, a driving pinion arranged to mesh with both of said gears, and means operative by rotation of one of said gears for causing said relative movement.

ll. In a machine of the class described, a tool arrier, means for imparting a feeding movement to said carrier, a rotatable and longitudinally movable driving means for said feeding means having a lost motion connection therewith and adapted to engage and operate said feeding means, and means for varying the amount of said lost motion.

12. In a machine of the class described, a plurality of working stations, a tool for each station, a feeding means for each tool, an independent rotatable and longitudinally movable driving means for each feeding means having a lost motion connection therewith and adapted to engage and operate said feeding means at predetermined times, and means for adjusting the amounts of said lost motions.

13. In a machine of the class described. a rotatable spindle support, a plurality of work carryinfr spindles carried by said support, a plurality of tool carriers. a feeding means for each carrier, an independent driving means for cach feeding means having a lost motion connecton therewith` and means for varying the amounts of sai/d los) motions.

14. In a machine of the class described, a rotatable spindle support, a plurality of work carrying spindles carried by said support, a slide movable toward and from said support, a plurality of tool carriers mounted on said slide` a feeding means for each carrier, an independent driving means for each feeding means having a lost motion connection therewith, and means for varying the amounts of said lost motions.

l5. In a machine of the class described.` ft tool carrier. feeding means for ,said carrier` a driving means for said feeding means lli) comprising a mutilated gear connected with said feeding means, a second gear, a driving connection between said gears arranged to be engaged anddisengaged by relative longitudinal movement of said gears, a driving pinion arranged to mesh with both said gears, a screw keyed to the first gear and having threaded engagement with the second gear. and means for rotating said pinion.

16. In a machine of the class described, a tool carrier. feeding means for said carrier, a driving means for said feeding means comprising a mutilated gear connected with said feeding means. a second gear, a driving connect'ou between said gears arranged t') be engaged and disengaged b v relative longitudinal movement of said gears, a driving pinion arranged to mesh with both said gears, a screw keyed to the first gear but adapted for movement longitudinal of its axis, means for holding the screw in different axial positions. said screw having threaded engagement with the second gear, and means for driving said pinion.

1T. In a machine of thc class described, a tool carrier, feeding means for said carrier, a driving means for said feeding means comprising a mutilated gear connected with said feeding means, a second gear in axial alignment with the first gear, said gears being provided with clutch teeth on their opposed faces, a screw keyed to the first gear and having threaded engagement with the second gear, a driving pinion arranged to mesh with both said gears, and means whereby the position of the second gear on the screw may be adjusted.

18. In a machine of the class described, a pluraiity of tool carriers, a feeding means for xach carrier, a driving means for each feeding means comprising a mutilated gear connected with its respective feeding means, a second gear, a driving connection between said gears arranged to be engaged and disengaged by relative longitudinal movement between said gears, a driving pinion arranged to mesh with both said gears, a screw keyed to the first gear and having threaded engagement with the second gear, means whereby the position of the second gear on the screw may be adjusted, and means for driving the said pinions.

19. In a machine of the class described, a tool carrier, a feeding means for said cai'- rier. adjustable means for varying the time of the beginning of the feeding, means for limiting the movement of said carrier, and a two part driving means having a spring driving connection between said parts providing a yieldable driving means for said feedmg means.

20. In a machine of the class described, a tool carrier, a feeding means for said earrier, means for limiting the movement ot said carrier, and a two part driving sha ft having a spring driving connection between said parts to provide a yieldable driving means for said feeding means and having a lost motion connection therewith.

21. In a machine of the class described.

a rotatable :spindle support. a plurality of work carrying spindles carried by said support, a plurality of tool carriers, a feedng means Vfor lach carrier, means for limiting the movementsl of said carriers, an independent yieldable driving means for each feeding means havingi` a lost motion connection therewith, and means for varying the amount of the individual lest motions.

12;'. ln a machine of the class described. a plurality of work carrying members, a plurality of tool carriers. an independent feeding means for cach carrier, an independent rotatable and longitudinallyy movable driving member for each feeding means arranged to engage and drive said means only after a given lon 'itmlinal movement, and means for indepemlenti)Y shifting said driving members whereby the stroke of each carrier mav be independentl)v varied.

E23. .In a machine of the class described, a plurality ol' work carrying members, a mov-- able slide, means for shifting said slide, a plurality of tool carriers mounted. on said slde, and independently movable thereon, an independent feeding means for each carrier, and means whereby the rate of feed and stroke of each carrier may be independently varied.

Q-t. In a machine of the class described` a plurality of work carrying members, a plurality of tool carriers, an independent feeding means for each carrier, an independent rotatable and longitudinally movable driving member for each feeding means, means for shifting said driving members wherebyv the stroke of each rarrier may be varied. and a single control mechanism for said feeding means.

In a machine oi the class described, a plurality of work rari ving members, a movable slide, a plurality of tool carriers mounted on said slide, a feeding means for each carrier, meansv whereby the feed of each carrier may be adjusted, and a single control means for said feeding means.

2G. In a machine of the class described` a tool carrier, a support for said carrier mounted for reciproeative and rotative movements, a guide block carried by said support, a guide for said block arranged to limit both the reciprocative and rotative movements, and means for feeding said snpport having a lost motion connection therewith.

QT. In a machine of the class described a tool carrier, a shaft forming a support for said carrier and adapted for longitudinal and rotative movements, a support for said shaft, Coacting means carried by the .sup-

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port and shaft to limit said movements, a rotatable screw having threaded engagement with the shaft, a mutilated gear keyed to said screw,l a second screw keyed to the gear, a second gear threaded on the latter screw, coacting driving means carried by said gears, a pinion adapted to mesh with both said gears,and means for driving the pinion.

28. In a machine of the class described, a tool carrier a reciproeable su ort for said carrier, a screw having threade engagement with said support, a driving means for rotating said screw, and a clamp secured to the screw and having a releasable connection with'the support.

29. In a machine of the class described. a tool carrier, a shaft forming a support for said carrier, a screw having threaded engagement with said shaft, a driving means for rotating the screw, a block secured to 'the screw to rotate therewith, and a releasable means for clamping the block to the shaft.

30. In a machine of the class described a frame, a slide mounted to reciprocate on said frame, a plurality of tool carriers movably mounted on the slide, feeding means for the carriers mounted on the slide, and a driving means for the feeding means earried by the frame.

3l. n a machine of the class described, a plurality of work carrying spindles, a slide movable toward and from said spindles, a plurality of tool carriers mounted on said slide. feeding means for the carriers mounted onthe slide, a control means for the feeding means, means controlled by the movement of the slide for controlling said feed control means and means for moving the slide.

32. In a machine of the class described, a plurality of work carrying spindles. a slide movable toward and fromsaid spindles, a plurality to tool carriers mounted on said Slide, feeding means for the carriers mounted on the slide, driving means for the feeding means, a clutch for controlling the driving means, means controlled by movement of the slide for controlling said clutch, and means for reciprocating said slide.

33. In a machine of the class described, a plurality of tool carriers feeding means for said carriers, independent driving means for the respective feeding means, a pair of clutches for controlling the driving means, means for operating said clutches having a lost motion connection therewith, means operating through said clutches to operate the feeding means in opposite directions, and means connected with the feeding means for controlling said clutches.

34. In a machine of the class described, a tool carrier, feeding means for said carrier, driving means for the feeding means including a pair of clutches for driving the feeding means in opposite directions, spaced controlling means for said clutches, a screw extending between said controlling means, a gear threaded on said screw. coacting driving means carried by the gear and the respective controlling means, and a driving connection between said gear and said feeding means.

35. In a machine of the class described, a tool carrier, feeding means for said carrier, means for driving the feeding means including a pair of clutches, means for driving the clutches in opposite directions, a slidable shaft, means carried by the shaft for operating said clutches, means for rotating said shaft includin a clutch, means connected with the feeding means for operating said latter clutch at predetermined times, and means for shifting the shaft as it rotates.

36. In a machine of the class described, a l

tool carrier, feeding means for said carrier, driving means for'the feeding means including a forwardly driving clutch and a reversing clutch, a slidable shaft, means carried by said shaft for operating the clutches, means for rotating said shaft including a clutch, means operated by turning movement of said shaft for reciprocating the shaft, a screw, a lever for controlling the latter clutch secured to said screw, a gear having threaded engagement with said screw, spaced means on the said screw adapted for operative engagement with said gear to swing said lever, and driving means between saidgear and the driving means for the feed.

37. In a machine of the class described, a movable slide, a tool carrier mounted on said slide, a feeding means for said carrier, feed and reverse clutches for driving said feeding means, means for operating the clutches to throw them from feed to reverse at the end of a working operation, means for throwing the clutches from reverse to feed at the end of the reversing operation, and means controlled by movement of the slide to delay engaging of the feed clutch until the slide has moved to a given position.

38. In a machine of the class described, a. movable slide, a tool carrier mounted on said slide, a'feeding means for said carrier, feed and reverse clutches for driving said feeding means, means for operating the clutches to throw them from feed to reverse at the end of a working operation, means for throwing the clutches from reverse to feed at the end of the reversing operation, and means controlled by movement of the slide for lcontrolling the feed clutch.

39. In a machine of the class described, a movable slide, a tool carrier mounted on said slide, a feeding means for said carrier,

feed and reverse clutches for driving said feeding means, means for operating the clutches to throw them from feed to reverse at the end of a working o eration, means for throwing the clutches rom reverse t0 feed at the end ofthe reversing operation, a stop to prevent engagement of the feed clutch in the latter operation, and means operated by movement of the slide to trip said stop.

40. In a machine of the class described, a movable slide, a plurality of tool carriers mounted on said slide, an independent feeding means for each carrier, a common driving means for said feeding means including feed'and reverse clutches, means for operating said clutches to throw them from feed to reverse at the end of a working operation, means for throwing the clutches from reverse to feed at the end of a reversing operation, and means controlled by movement of the slide for controlling the feed clutch.

41. In a machine of the class described, a movable slide, a plurality of tool carriers mounted on said slide, an im'lependent feeding means for each carrier, an independent driving means for each feeding means including an adjustable lost motion connection, a common driving means for said first mentioned driving means including feed and reverse clutches, means for operati-ng said clutches to throw them from feed to reverse at the completion of a working operation, means for throwing the clutches from reverse to feed at the end of a reversing operation, and means controlled by movement of the slide for controlling the feed clutch.

42. In a machine of the class described a tool carrier, feeding means for said car rier, driving means fbr the feeding means including a forwardly driving clutch and a reversing clutch, a slidable shaft, means carried by said shaft for operating the clutches,

means for rotating saidl shaft including a clutch, means operated by turning movelnent of said shaft for reciprocating the shaft, a screw, a lever for controlling the latter clutch having a lost motion connection with said screw, manual means for operating said lever, a. gear having threaded engagement with said screw, spaced means on the said screw adapted for operative engagement with said gear to swing said lever, and driving means between said gear and the driving means for the feed.

4B. In a m'achine of the class described, a tool carrier, feeding means for said carrier, means for driving the feeding means including a pair of clutches, means for driving the clutches in opposite directions, a 'slidable shaft, means carried by the shaft for operating said clutches, means for rotating said shaft including a clutch, manually operable means connected with the feeding means with a lost motion connection and arranged for operating the latter clutch at redetermined times, and means for shi ting the shaft as it rotates.

44. In a machine of the class described, a rotatable spindle carrier, a plurality of work carrying spindles mounted on said carrier, means for intermittently indexing said carrier, a plurality of tool carriers, means for feeding said tool carriers, means for driving the feed means including a feed and reverse clutch, automaticmeans for throwing said clutches from feed to reverse at the completion of a working operation and from reverse to feed at the end of the reversing operation, manually operable means for controlling said indexing means, and means controlled by the automatic means for controlling said manual means.

45. In a machine of the class described, a rotatable spindle carrier. a plurality of work carrying spindles mounted on said carrier, means for intermittently indexing said carrier. a plurality of tool carriers, means for feeding said tool carriers, means for driving the feeding means including a feed and reverse clutch, automatic means for throwing said clutches from feed to reverse at the completion of a working operation and from reverse to feed at the end of the reversing operation, manually operable means for controlling said indexing means, a catch to prevent operation of said manual means, and means operated by the said automatic means to release said catch at the completion of the reversing operation.

46. In a machine of the class described, a main drive, a main clutch connected to said drive," a rotatable spindle carrier, a plurality of work carrying spindles mounted on said carrier, means for indexing said carrier connected to the main drive, means for driving the spindles from said main clutch, a manually controlled means for mntrolling said main clutch and said indexing means, and means to prevent throwing said clutch during the indexing operation.

47. In a machine of the class described, a main drive, a main clutch connected to said drive, a rotatable spindle carrier, a plurality of work carrying spindles mounted on said carrier, means for indexing said carrier connected to the main drive, means for driving the rspindles from said lnain clutch. a manually controlled lever, means operable by movement of said lever in one direction to disengage said clutch and cause the indexing means to function, and means to prevent movement in the opposite direction to throw in said clutch until the indexing operation has been completed.

48. In a machine of the class described, a main drive, a main clutch connected to said drive, a rotatable spindle carrier, a plurality l Ut) tit) of work carrying spindles mounted on said carrier, means for indexing said carrier connected to the main drive, means for drivingr the spindles from said main clutch, a plurality of tool carriers, means for feeding said tool carriers, means for driving the feeding means including a feed and reverse clutch, automatic means for throwing said clutches from feed to reverse and from reverse to feed, a manually controlled means for controlling the indexing means, means controlled by said manually controlled means for controlling said main clutch, means controlled by the automatic means for controlling said manual means, and means to prevent throwing said main clutch during the indexing operation.

49. In a machine of the class described. a rotatable spindle carrier, a plurality of work carrying spindles mounted in said carrier, means for sliding said carrier longitudinally of its axis, means for locking said carrier against rotation, which means is locked and released by said longitudinal movement, disengageable clutches for driving the individ ual spindles which are engaged and disengaged by said longitudinal movement, .and means for indexing said carrier.

50. In a machine of the class described, a rotatable spindle carrier, a plurality of work carrying spindles mounted in said cariier, means for sliding said carrier loiigitudinally of its axis, a stationary bracket, complementary locking means carried by said bracket and carrier arranged to beengaged and disengaged by said longitudinal movements. disengageable clutches for driving the individual spindles arranged 'to be engaged and disengaged by said longitudinal movements, and means operated in certain timing relation with said longitudinal movements for rotating said carrier with a step by step movement.

51. In a machine of the class described, a rotatable spindle carrier, a plurality of work carryin spindles mounted in said earrier, means or sliding said carrier longitudinally of its axis, a driving clutch for each spindle including a slidabledriving member and a spring tending to move it toward driving position, a stop for limiting the movement of said member upon longitudinal movement of the carrier to disengage the clutch, means for locking said cai'- rier against rotation which means is locked and released by said longitudinal movements, and means operated in certain timing relation with said longitudinal movements for rotating said carrier with a step by step movement.

52. In a machine of the class described, a rotatable spindle carrier, a plurality of work carrying s indles mounted on said carrier, means for ocking said carrier a ainst rotation, a slide movable toward an from said carrier, a plurality of tool carriers mounted on said slide, independent feeding means for the respective tool carriers, a control shaft, means controlled by said shaft for moving the slide from working position, unlocking the spindle carrier, indexing said carrier, locking said carrier and returning the slide to working position, and means for controlling the operation of said shaft.

53. In a machine of the class described, a rotatable spindle carrier, a plurality of work carrying spindles mounted on said carrier, means for locking said carrier against rotation, a slide movable toward and from said carrier, a plurality of tool carriers mounted on said slide, independent feeding means for the respective tool carriers, a main drive clutch connected with a source of power, driving connections from said clutch to the work spindles and the tool feeding means, a normally stationary control shaft, means controlled by said shaft for moving thev slide from working position, unlocking the spindle carrier, indexing said carrier, locking said carrier and returning the slide to working position, a manually operated level', means operated by movement of said lever in one direction for releasing the main clutch and causing the control shaft to function, means operated by movement of said lever in the opposite direction to throw in the main clutch, and means for preventing the latter movement of said lever while the spindle carrier is indexing.

54. In a machine of the class described, a rotatable carrier, a plurality of work carrying spindles mounted on said carrier, means for indexing said carrier with a step by step movement, means for driving the spindles including a main clutch, moans for driving the indexing means including an auxiliary clutch, a rotatable cani plate provided with a cam to control said latter clutch and having a shoulder, a control level', a shaft operated bfy said lever, means carried by the shaft or throwing out the main clutch, a

pawl adapted to engage said shoulder to rotate the disc and throw in the auxiliary clutch, means connecting the lever controlled shaft with said pawl to operate the same, and means for rotating said disc to disconnect the auxiliary clutch at the completion of the indexing operation.

55. In a machine of the class described, a tool carrier, feeding means for said carrier, a driving means for said feeding means also adapted for returning said carrier, a gear, a driving connection between said gear and said driving means arranged to be engaged and disengaged by relative movement between them, means arranged for driving connection with both the gear and the driving means, and means operative by rotation of said gear for causing said 'relative movement. 

